Speed-regulator for pumps.



PATENTE) JUNE 1s. 1907.

. w. W'. SATTBRTHWAIT v SPEED REGULATOR FOR PUMPS.

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SPEED REGULATOR PoR Pmsfms.

, f /NvENro/ WMMLEAT TEHTHWAITB d 29 v am# APPLICATION FILED 00T.31.1906.

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WILLIAM W. SATTERTHWAITE, OF WASHINGTON, NORTH OAROLIN A.

vSPEED-REGULATOR FOR PUMPS- Specicaton of Letters Patent.

Patented June 18, 1907.

Application led October 31, 1906. Serial. No. 341,459.

To, all whom it may concern:

Be it known that I, WILLIAM W. SATTER- THWAITE, a citizen of the UnitedStates, and a resident of Washington, in the county of Beaufort andState of North Carolina, have made certain new and useful Improvementsin Speed-Regulators for Fluid Operated Pumps, of which the following isa speciiicat1on.

My invention is an improvement in speed tions of parts hereinafterdescribed and claimed.

Referring to the drawings forming a part hereof-Figure l is a side viewof a fluid operated ump provided with my improvement. ig. 2 is avertical longitudinal section through the speed regulating mechanism,Fig. 3 is a section on the line 3--3 of Fig. 2. Fig. 4 is a plan view ofthe valve stem arm. Fig. 5 is a topplan view of the Fig. 6 is a sectionon the line 6 6 of Fig. 5. Fig. 7l is a view similar to Fig. 6, partlybrolren away and showing the valve partly open. Fig. 8 is a top planview of the valve, and Fig. 9 is a side view showing the valve separatedfrom its seat. Fig. l0 is a vertical longitudinal section of amodification of the speed regulating mechanism. Fig. 11 is a section onthe line 11-11 of Fig. 10.

In the present embodiment of my invention, I have shown the same appliedto a4 fluid operated-pump A, provided with an eX- haust pira connectedwith the hydraulic cylinder A valve C is interposed in the exhaust pipeof the pump, the said valve comprising a casing c, provided with apartition c', having a substantially horizontal portion c2 with anopening c3 therethrough. A circular valve seat c4 is secured to thehorizontal portion c2 of the partition by means of screws es, and thesaid valve seat is provided with an opening c5, registering with theopening c3 through the partition.

The upper face of the valve seat is provided with oppositely arrangedshoulders c, connected by inclinedsurfaces c7; and the valve o9 iscircular andi is v rovided with shoulders@10 and inclined su aces csimilar to the shoulders c and inclined surfaces c7 of the valve seat,and the said valve normally rests upon the valve seat, with itsshoulders Vin contact-With theA shoulders of the valve stern (Z8.

seat, thusclosing the opening through the said seat.

A valve stem 012 provided with a reduced squared end cl3 engages anopening c24 in the valve, and is secured .in` the opening by means of apin c, The bonnet 015 of the valve is secured to the casing by means ofthe bolts 019 traversing openings in the bonnet and threaded into thecasing, and the said bonnet is provided with a recess for receiving apacking 02, retained in position by a packing nut 021 encircling thestem and threaded into the bonnet. A spring 018 is arranged between thebonnet and the valve,- the spring being unnecessary, however, eX- ceptwhen the valve is operated in an inverted position.

The end of the valve stem is threaded as at C22, and is engaged by thethreaded opening of an arm o23, the said arm being secured in itsadjusted position by means of lock nuts o16, and being provided with aplurality of openings 017, for a purpose to be hereinafter described.

The speed regulator D comprises a casing do having an opening in whichworks one end d of a plunger d', the said plunger having a `longitudinalopening LZ2 therethrough, and

being provided with an annular shoulder d4, for a purpose to behereinafter described.

The upper end d5 of the plunger d is of greater diameter than the lowerend, and works within a cylinder d, the upper end of the cylinder beingreduced as at Z7 and threaded into the lower enlarged end of the stemcZS, and packing (Z9 encircles the end (Z5 of the plunger within thecasing and is retained in place by a packing nut d10.

The lower end of the stem Z8 is provided with an integral collar dhaving openings to receive rods 12, the said rods being. arranged oneach side of the stem and threaded into the casing (Z0 as shown in Fig.2. The upper end of the stem (ZS passes through a collar (Z13, thecollar being provided with oppositely arranged lugs (ZM for receivingthe rods du; and a spring Z15 is arranged between the collar Z13 and thecollar dll at the lower portion of the Nuts d1` are threaded on theupper end ofthe rods Zlzto retain the collar Z13 in place, and shouldersd are provided upon the rods for limiting the upward motion of the stem(Z8.

The casing d is connected with the hydraulic cylinder -B by-means ofY apipe b in IOO IIO

' pump.

such manner that pressure of the fluid in the cylinder or reservoir mayact directly upon the plunger d and indirectly upon the stem d8 throughthe passage d in the said plunger d.

The stem d8 is provided with a lug d to which is pivotally connected oneend of a link d1", the other end of the link being pivotally connectedin its turn to one of the arms d20 of an elbow lever pivoted to abracket C121 projecting from the. casing. The other arm Z22 of the elbowlever is provided with a plurality of openings e123, and a link 124connects the said arm (221 of the elbow lever with the arm 017 of thevalve stem.

It will be evident from the description of the regulating mechanism,that by screwing the rods X12 in or out of the threaded openings of thecasing the position of theshoulders d may be varied to adjust themovement of the stem d8, and that by manipulatingthe nuts d16 on theouter ends of the rods (i12, the tension of the spring (115 may bevaried to move the valve when the desired pressure is attained. Byconnecting the link 24 with different holes in the arm 023 and the arm(Z22, the extent of movement of the valve may be adjusted whereby tovary the extent of the opening thereof.

In the operation of my device, when the pressure in the cylinder orreservoir B becomes sufficient to overcome the tension of the springdu", the stem d8 is elevated and throughits connection with the valvestern 012 the valve is partially closed, thus slowing the exhaust and asa consequence slowing the Further increase in the pressure in thecylinder will tend to further close the exhaust, thus nicely regulatingthe speed of the pump by the pressure in the cylinder.

When the valve is placed in the exhaust pipe as above described, thecylinders of the pump are maintained at about the same temperature,since the steam is maintained therein and not cut off as would be thecase were it placed in the 'steam feed pipe.

It will be understoodthat when the pump is in operation the pipe b andregulator D will contain a certain amount of iiuid depending upon thepressure in the reservoir, and that an increase of such pressure willpass through the hole in the plunger dgin the cylinder d6 tending tolift said cylinder until the yoke d takes upk against the lugs du.

My above described improvement may also, be used as a rejector for steamor other iuid when there is a greater pressure of said fluid than isdesired to be used. For instance-should there be 200 pounds of steam inthe boiler, and a 2O pound pressure is desired for a radiator, the valvemay be set at 20 pounds pressure and so long as there is 20 pounds ofsteam in the boiler the radiator will receive that amount. l

In Figs. 10 and 11 isshown a modification of the device in which theidle plunger is dispensed with, the fluid pressure acting directly uponthe stem. In the above modification the speed regulator D comprises thecasing d having the opening in which works a plunger (125, the saidplunger having a stem comes suflicient to overcome the tension of thespring CX15 the plunger d25 is elevated, thus partially closing thevalve and slowing the pump. The above described modiiication is intendedfor use with a comparatively steady pressure, the rst described formbeing preferably used when the pressure is subject to sudden variations.

\ It will be understood that the openings in the cylinder d6 and thecasing d0 in which work the plunger d are coaxial, and the upl per endof the said plunger is of greater diameter than the lower end, wherebythe pressure of the fluid is reduced as it passes .from the casing tothe cylinder, thus resulting in a retarding of the action of the stem.

I claim:

1. lIn a speed regulator for fluid operated pumps, the combination withthe pump and the reservoir for liquid under pressure connectedtherewith, of a casing connected with the reservoir, a stem above thecasing and spaced apart therefrom, said stem having an integral collarat the end adjacent to the casing and a collar slidably mounted on thestem at the outer end thereof, rods threaded into the casing andextending parallel with the stem and upon each side thereof, said rodsextending through both collars and having their free ends screwthreaded,shoulders on the rods for limiting the movement of the stern, nutsengaging the ends ofthe rods, a spring encircling the stem between thecollars, a cylinder threaded into the lower end of the stern, theopening of the cylinder being coaxial with the opening of the casing,and a plunger having a relatively large end working in the cylinder anda relatively small end working in the casing, said plunger having alongitudinal opening therethrough, and an annular shoulder on the outersurface thereof for engaging the cylinder to limit the motion thereof,the shoulder resting upon the casing, a valve connected with the exhaustof the pump and a connection between the valve and the plunger wherebymovement of the plunger will operate the valve.

2,. In a speed regulator for fluid operated 'IIO pumps, the combinationwith the pump and the reservoir Jfor li uid under pressure connectedtherewith, olla casing connected with the reservoir, a cylinder arrangedabove the casing and spaced apart therefrom, the opening of the cylinderand the opening of the casing being coaxial with each other, a plungerhaving one end oi relatively large diameter movable in the cylinder, andthe other end of relatively small diameter movable in the casing, saidplunger having a longitudinal opening therethrough, a valve connectedwith the exhaust of the pump, and a connection between the cylinder andthe valve whereby the movement of the cylinder may operate the valve.

' 3. In a speed regulator for luid operated pumps, the combination withthepump and the reservoir for liquid under pressure connected therewith,of a casing connected with the reservoir, a plunger movable in thecasing and provided with a stem projecting therebeyond, said stem havingan integral collar adjacent to the casing, and a collar slidably mountedon the stem, at the outer end thereof, rods threaded into the casing andextending parallel with the stem and upon each side thereof, said rodsextending through both the collars and having their iree ends screwthreaded, shoulders on the rods for limiting the movement of theplunger, nuts engaging the ends of the rods, a spring encircling thestem between the collars, a valve connected with the exhaust of thepump, and a connection between the valve and the plunger whereby themovement of the plunger may operate the valve.

4. In a speed regulator for fluid operated pumps, the combination withthe pump and reservoir for liquid under pressure, connected therewith,of a valveinterposed in the exhaust of the pump, a casing connected withthe reservoir, a plunger movable in the casing, a spring normally actingto move the plunger against the force of the liquid under pressure,means for regulating the tension of the spring, a bracket projectingfrom the casing, an elbow lever pivoted on the bracket, a linkconnecting the plunger with one of the arms ofthe elbow lever, and aconnection between the other arm and the valve whereby movement of theplunger will operate said valve.

t, 5. In a speed regulator for fluid operated pumps, the combinationwith the pump and the reservoir for liquid under pressure connectedtherewith, of a casing connected with the reservoir, a spring actuatedplunger movable within the casing, a bracket projecting from the casing,an elbow lever journaled in the bracket, a connection between one of thearms of the elbow lever and the plunger, a valve in the' exhaust pipe ofthe pump, and a connection between the valve and the other arm oftheelbow lever, whereby movement of the plunger will open and close saidvalve.

6. In a speed regulator for iiuid operated pumps, the combination withthe pump and the reservoir for li uid under pressure connectedtherewith, Voga valve interposed in the exhaust of the pump, said valvecomprising a casing for a partition provided with an openingtherethrough, a valve seat secured to the partition and having its outerface provided with oppositely arranged shoulders connected by inclinedsurfaces leading Jfrom the base of one shoulder to the top of the other,said seat having a central opening registering with. the opening of thepartition, a valve resting upon the seat and having oppositely arrangedshoulders and inclined surfaces contacting with the shoulders and theinclined surfaces of the seat, a stem connected with the valve, aplunger acted upon by the pressure of the fluid in the reservoir, and aconnection between the plunger and the valve stem whereby the movementof theplunger will operate the stem to open and close the valve.

WILLIAM W. SATTERTHWAITE.

Witnesses:

JNO. N. SMALL, ANGUs D. MAGLEAN.

